Classen, Albrecht. "Liepe, Wolfgang" Handbook of Medieval Studies. Berlin, Boston: De Gruyter, 2010. 2474-2477. Web. Retrieved 22 May. 2013, from http://www.degruyter.com/view/books/9783110215588/9783110215588.2474/9783110215588.2474.xml

Classen, A. (2010). Liepe, Wolfgang. Handbook of Medieval Studies (pp. 2474-2477). Berlin, Boston: De Gruyter. Retrieved 22 May. 2013, from http://www.degruyter.com/view/books/9783110215588/9783110215588.2474/9783110215588.2474.xml

Classen, Albrecht. 2010. Liepe, Wolfgang. In Handbook of Medieval Studies, 2474-2477. Berlin, Boston: De Gruyter. Retrieved 22 May. 2013, from http://www.degruyter.com/view/books/9783110215588/9783110215588.2474/9783110215588.2474.xml